Just bought a new home and opened up the unit downstairs. The tag says tempstar. I know how to read the serial number L970751855 which means made in 1997 7th week of the year. I need help to find out what size and sear the coil is so I can match up the outside condensor unit as the outside unit was stolen. The model number is NTC5075BFD1. It has gas supply running to the heater also. If anyone can help me It would be greatly appreciated.